Powertrain
generic / SAE
P2278
O2 Sensor Signals Swapped Bank 1 Sensor 3 / Bank 2 Sensor 3
The PCM detects that the O2 sensor signals from bank 1 sensor 3 and bank 2 sensor 3 are swapped — typically a wiring crossover after sensor replacement.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number2 / 78
Possible causes
- Wiring crossover after sensor replacement high
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 10–100 €
- Estimated time: 0.2–1 h
- Component: oxygen sensor
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012